(19)
(11) EP 2 476 910 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
17.01.2018 Bulletin 2018/03

(43) Date of publication A2:
18.07.2012 Bulletin 2012/29

(21) Application number: 12151162.0

(22) Date of filing: 13.01.2012
(51) International Patent Classification (IPC): 
F04D 27/00(2006.01)
 F04D 27/02(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 13.01.2011 US 201113005601

(71) Applicant: Energy Control Technologies, Inc.
Urbandale, IA 50322 (US)

(72) Inventors:
  • Narayanan, Krishnan
    Urbandale, IA Iowa 50322 (US)
  • Reinke, Paul
    Urbandale, IA Iowa 50322 (US)
  • Dukle, Nikhil
    Urbandale, IA Iowa 50322 (US)

(74) Representative: Walker, Ross Thomson et al
Forresters IP LLP Skygarden Erika-Mann-Strasse 11
80636 München
80636 München (DE)

   


(54) Method for preventing surge in a dynamic compressor using adaptive preventer control system and adaptive safety margin


(57) A method of preventing surge in a dynamic compressor is disclosed. The method includes providing an anti-surge valve having an adjustable opening for increasing the flow through a dynamic compressor. The next step is sensing process conditions in the dynamic control to determine a compressor load variable. A control system estimates a process disturbance model using the compressor load variable. The control system then adjusts a safety margin using a rate limited response and initiates a closed loop response using process feedback based on the process disturbance model. The control system adjusts the opening of the anti-surge valve according to the safety margin and closed loop response.







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